28780983

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{349}}^1$

素因数の和:397

約数の個数: 72

約数和(自身を含む): 56019600

約数和(自身を除く): 27238617

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 49, 51, 63, 77, 99, 119, 147, 153, 187, 231, 349, 357, 441, 539, 561, 693, 833, 1047, 1071, 1309, 1617, 1683, 2443, 2499, 3141, 3839, 3927, 4851, 5933, 7329, 7497, 9163, 11517, 11781, 17101, 17799, 21987, 26873, 27489, 34551, 41531, 51303, 53397, 65263, 80619, 82467, 124593, 153909, 188111, 195789, 241857, 290717, 373779, 456841, 564333, 587367, 872151, 1370523, 1692999, 2616453, 3197887, 4111569, 9593661, 28780983]

約数ペア:

[(1, 28780983), (3, 9593661), (7, 4111569), (9, 3197887), (11, 2616453), (17, 1692999), (21, 1370523), (33, 872151), (49, 587367), (51, 564333), (63, 456841), (77, 373779), (99, 290717), (119, 241857), (147, 195789), (153, 188111), (187, 153909), (231, 124593), (349, 82467), (357, 80619), (441, 65263), (539, 53397), (561, 51303), (693, 41531), (833, 34551), (1047, 27489), (1071, 26873), (1309, 21987), (1617, 17799), (1683, 17101), (2443, 11781), (2499, 11517), (3141, 9163), (3839, 7497), (3927, 7329), (4851, 5933)]